Home / 3,926.84-5,419.13-2,158.47

Finding the Fourth Proportional to 3,926.84, 5,419.13 and 2,158.47

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Solution

The fourth proportional to 3,926.84, 5,419.13 and 2,158.47 is: 2,978.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,926.84 : 5,419.13 = 2,158.47 : x
  2. Step 2: Convert to fraction form
    3,926.84/5,419.13 = 2,158.47/x
  3. Step 3: Cross multiply
    3,926.84x = 5,419.13 × 2,158.47
  4. Step 4: Simplify right side
    3,926.84x = 11,697,018.74
  5. Step 5: Solve for x
    x = 11,697,018.74/3,926.84
  6. Step 6: Final answer
    x = 2,978.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.